Jose M. Sanchez wrote: >Just to chime in on this subject... > >The AliMagic and VIA based motherboards have "broken" chipsets. > >I've spoken to both companies engineers about this issue. > >This discussion arose because both chipsets have problems with DMA >overlays when using the BT8xx type TV tuner cards... > >The problem is with clock timing (the famous broken clock timer chip!!!) >and DMA xfers. As you push the udma speed the spurious clock pulses >wreak havoc with the memory writes. > >The Windows drivers try to make the OS work around the problem... > >This may be why people are seeing corruption. Couple this with Civilme's >statement on WD drives and lack of CRC DMA data checking, and it's a >wonder that Linux even runs on these systems. > >Turning OFF DMA or reducing UDMA to 33 seems to help with this >problem... > >Your milage may vary though... > >-JMS > > Hi,
Valuable input. I've got an Intel chipset but indeed a bttv tv tuner and a Firewire card from VIA technologies and suffer the same problems. Guy.
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